为研究大容积车载液氢瓶储运过程中的液氢瓶导热安全性问题,结合实际车载液氢瓶结构建立数值模型,在不同环境温度、压力以及加速度等参数变化情况下,分别对液氢瓶启停工况下单一参数和多参数耦合变化时液氢瓶内部温度及热通量变化进行模拟分析。结果表明：单一参数变化时,随着加速度增大,瓶内热通量升高;瓶内压力增大,热通量降低;环境温度越高,热通量越高。双因素耦合时,加速度增大会抑制环境温度降低对瓶内热通量的降低作用,同时促进压力升高对瓶内热通量的降低作用;压力增加会抑制环境温度升高对瓶内热通量的增加作用。
Abstract
A numerical model was established based on the actual structure of vehicle-mounted liquid hydrogen cylinders in order to study the thermal conduction safety of the cylinders during the storage and transportation of large-volume vehicles. The internal temperature and heat flux changes of the cylinders were simulated and analyzed under the coupling changes of single parameters and multi-parameters under the start-stop conditions of the cylinders under various environmental temperature, pressure, and acceleration conditions. The findings demonstrate that the heat flux in the cylinder increases as acceleration increases when a single parameter is changed. The heat flux falls as cylinder pressure rises; the heat flux increases with increasing room temperature. When there is a two-factor coupling, an increase in acceleration reduces the impact of ambient temperature decrease on the heat flux in the cylinder while simultaneously enhancing the impact of pressure increase; an increase in pressure reduces the impact of an increase in ambient temperature on the heat flux in the cylinder. It offers a theoretical foundation for the safe application of large-volume liquid hydrogen cylinders installed in vehicles.
关键词
热通量 /
导热性 /
计算流体力学 /
液氢 /
大容积车载液氢瓶
Key words
heat flux /
thermal conductivity /
computational fluid dynamics /
liquid hydrogen /
large volume vehicle liquid hydrogen cylinder
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基金
江苏省碳达峰碳中和科技创新专项资金（BE2022001）; 江苏省研究生科研与实践创新计划项目（KYCX23_3161）
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